With each software update in Version 6, ExaGrid has been adding additional layers of security to its Tiered Backup Storage, which already guards against external threats by utilizing a non-network-facing repository tier (tiered air gap) with delayed deletes and immutable data objects where backup data is stored for longer-term retention that cannot be accessed by threat actors and cannot be modified by malicious attacks. In Version 6.3, ExaGrid strengthens security for protection against internal threats such as rogue admins, with a greater emphasis and more control and visibility via existing role-based access control (RBAC) functionality, which is comprised of Backup Operator(s), who have limitations such as any deletions of shares; the Admin(s), who are allowed to do any administrative operation; and Security Officer(s) who cannot do the day-to-day operations, but are the only users that can approve changes that would affect retained backups.

Source: Help Net Security